I opted for Mertens because Mertens actually is a guarantee of quality. As everywhere saves course here at the wrong end. I have the smoke detector is now about two months, and had to have often annoyed. We have a stove in the living room, and a smoke detector in the hallway. Now the detector has been triggered three times in the short time that he was not actually intended. Only there was no sign of smoke. Early triggering would not even bother me if it was not (and now comes my review) this too unstable base would. So things go not when you often have to take down the detector. The detector can be turned with difficulty out of the socket when reinserting it hackelt same. That's no fun. Therefore, I would choose this model does not again.
